I remember the old CRT TVs with labels on the rear for disconnecting power and the panels had the power connection integrated so you couldn't take it off without the power being disconnected. For all those homeowners moonlighting as TV repairmen/aka tube swappers.
-Dave From: Ted Eckert [mailto:[email protected]] Sent: Thursday, October 23, 2014 2:59 PM To: [email protected] Subject: Re: [PSES] Disconnect power before servicing label required? The requirements vary depending on the product type. To some extent, the requirements for marking panels that enclose hazardous voltages depend on the risk that the end user will remove the panel. It is reasonable to anticipate that the end user would remove panels on industrial equipment. However, this is not necessarily true for many consumer products. For a product used in the home, Torx screws may be sufficient to make a panel considered a non-removable part. This view has become more prevalent as we move more towards a throw-away society. If a $15 hand mixer stops working, the owner is far more likely to throw it away than to unscrew the case to see what is wrong. There will be some people who will try to repair their appliances, but it becomes their responsibility to unplug it first. I can also note that I believe that there is a general principle that plug connected consumer equipment is viewed differently. As I noted, it is expected that the device will be unplugged before servicing. Industrial equipment is more likely to be hard wired where the service personnel may not know which parts are live or which parts are de-energized by a disconnect. Of course, product standards will vary in marking requirements and what I have said can be viewed only as a general guideline. Ted Eckert Compliance Engineer Microsoft Corporation [email protected]<mailto:[email protected]> The opinions expressed are my own and do not necessarily reflect those of my employer. They do not necessarily reflect those of any standards writing organization. They may not reflect reality. Consider them just a stream of consciouness from somebody with a few spare minutes before their next meeting starts. From: Kunde, Brian [mailto:[email protected]] Sent: Thursday, October 23, 2014 11:21 AM To: [email protected] Subject: Re: [PSES] Disconnect power before servicing label required? I thought it was common in most safety standards to require such a warning marking on panels with AC Mains hazard behind them. Something like this statement from IEC/EN/UL 61010-1 for ISM equipment: "If the instructions for use state that an OPERATOR is permitted to gain access, using a TOOL, to a part which in NORMAL USE may be HAZARDOUS LIVE, there shall be a warning marking which states that the equipment must be isolated or disconnected from the HAZARDOUS LIVE voltage before access." I thought a high voltage warning marking was required on all panels with such hazards behind them. Is this not true or just not true for IT equipment? I also thought that devices with multiple power sources, such as two AC power cords, had to have a warning marking informing the user to disconnect both or all power connections before gaining access. The Other Brian From: Jim Hulbert [mailto:[email protected]] Sent: Thursday, October 23, 2014 1:55 PM To: [email protected]<mailto:[email protected]> Subject: Re: [PSES] Disconnect power before servicing label required? Thanks for the replies. This product only has a single external power source, so no label is required. (And yes, Boštjan, I meant appliance "inlet", not "outlet"). Jim From: Jim Hulbert [mailto:[email protected]] Sent: Thursday, October 23, 2014 1:09 PM To: [email protected]<mailto:[email protected]> Subject: [PSES] Disconnect power before servicing label required? A question has been posed to me, with reference to ITE standards UL/EN 60950-1, whether a label is required near the appliance outlet stating "disconnect power before servicing". The equipment is table top ITE, pluggable with a detachable cord. I do think it is an appropriate instruction for the manuals, but I don't see a requirement for it to be on a label. Is it acceptable to have the instruction in the manual only? Thanks. Jim Hulbert Pitney Bowes ________________________________ - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]<mailto:[email protected]>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)<http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]<mailto:[email protected]>> Mike Cantwell <[email protected]<mailto:[email protected]>> For policy questions, send mail to: Jim Bacher <[email protected]<mailto:[email protected]>> David Heald <[email protected]<mailto:[email protected]>> ________________________________ - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]<mailto:[email protected]>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)<http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]<mailto:[email protected]>> Mike Cantwell <[email protected]<mailto:[email protected]>> For policy questions, send mail to: Jim Bacher <[email protected]<mailto:[email protected]>> David Heald <[email protected]<mailto:[email protected]>> ________________________________ LECO Corporation Notice: This communication may contain confidential information intended for the named recipient(s) only. If you received this by mistake, please destroy it and notify us of the error. Thank you. - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]<mailto:[email protected]>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)<http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]<mailto:[email protected]>> Mike Cantwell <[email protected]<mailto:[email protected]>> For policy questions, send mail to: Jim Bacher <[email protected]<mailto:[email protected]>> David Heald <[email protected]<mailto:[email protected]>> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]<mailto:[email protected]>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)<http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]<mailto:[email protected]>> Mike Cantwell <[email protected]<mailto:[email protected]>> For policy questions, send mail to: Jim Bacher <[email protected]<mailto:[email protected]>> David Heald <[email protected]<mailto:[email protected]>> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
